Firewall Fundamentals

Behtash, Behzad. CCSP Self-Study: Cisco Secure PIX Firewall Advanced (CSPFA), Second Edition (Cisco Press)

Cheswick, William, Steven Bellovin, and Aviel Rubin. Firewalls and Internet Security: Repelling the Wily Hacker, Second Edition (Addison-Wesley Professional)

Comer, Douglas E. Internetworking with TCP/IP Vol.1: Principles, Protocols, and Architecture, Fourth Edition (Prentice Hall)

Deal, Richard. Cisco Router Firewall Security (Cisco Press)

McCarty, Bill. Red Hat Linux Firewalls (Red Hat Press)

Noonan, Wes. Hardening Network Infrastructure (McGraw-Hill Osborne Media)

Shinder, Thomas W. Dr. Tom Shinder's Configuring ISA Server 2004 (Syngress)

Vladimirov, Andrew, Konstantin Gavrilenko, and Andrei Mikhailovsky. Hacking Exposed Cisco Networks (McGraw-Hill Osborne Media)